A wear-resistant high-precision rotating shaft structure for an electronic device

Abstract

The utility model discloses a kind of wear-resistant high-precision rotating shaft structures for electronic equipment, including fixed support, rotating support and rotating core shaft, rotating core shaft one end is penetrated and is fixed on the rotating support by fixed pin, and the other end is rotatably connected with the shaft hole opened on the fixed support, wear-resistant structure is installed between the fixed support and the rotating support;The wear-resistant structure includes frictional damping structure that is pre-tightened in axial direction to generate static friction force for maintaining the screen part arbitrary angle hover and pressure compensation structure that automatically compensates the attenuation of pre-tightening force to maintain the long-term stability of the static friction force.By the above mode, a kind of wear-resistant high-precision rotating shaft structure for electronic equipment of the utility model, wear-resistant structure is installed on the rotating shaft structure, can increase its wear resistance, to improve its service life, overcome the problem existing in the precision rotating shaft for current high-end equipment.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment manufacturing, and in particular to a wear-resistant, high-precision rotating shaft structure for electronic equipment. Background Technology

[0002] The hinge is a core mechanical component in electronic devices such as laptops, 2-in-1 tablets, and foldable screen devices, connecting the base to the screen. Its performance directly determines the user experience, structural reliability, and overall lifespan of the device. An ideal hinge needs to have high-precision damping to achieve stable screen suspension, excellent wear resistance to maintain consistent performance over long-term use, and good shock absorption and positioning feel.

[0003] Precision shafts used in mid-to-high-end equipment typically employ sliding friction between metal shims to generate damping. To obtain sufficient friction, a large axial preload is usually required. However, after prolonged use, the friction interface wears down due to direct metal-to-metal friction, leading to a decrease in preload and problems such as the shaft becoming loose, the screen being unable to hover, or wobbling. Furthermore, the metal particles generated by wear may exacerbate abrasive wear and contaminate the inside of the equipment. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a wear-resistant, high-precision rotating shaft structure for electronic devices, which can increase its wear resistance and thus improve its service life.

[0005] To solve the above-mentioned technical problems, the present invention provides a wear-resistant high-precision rotating shaft structure for electronic devices, comprising a fixed bracket, a rotating bracket, and a rotating spindle. One end of the rotating spindle passes through and is fixed to the rotating bracket by a fixing pin, and the other end is rotatably connected to a shaft hole opened on the fixed bracket. The fixed bracket and the rotating bracket are respectively connected to the base part and the screen part of the electronic device. A wear-resistant structure is installed between the fixed bracket and the rotating bracket. The wear-resistant structure includes a friction damping structure subjected to a preload in the axial direction to generate static friction force for maintaining the screen portion suspended at any angle, and a pressure compensation structure that automatically compensates for the attenuation of the preload to maintain the long-term stability of the static friction force. The friction damping structure is disposed on the rotating spindle, and the pressure compensation structure is disposed between the friction damping structure and the fixed bracket and between the friction damping structure and the rotating bracket.

[0006] In a preferred embodiment of the present invention, the center of the rotating spindle is provided with a non-circular segment, and the friction damping structure is disposed on the non-circular segment.

[0007] In a preferred embodiment of the present invention, the friction damping structure includes two metal pads and a first polymer composite material pad, the first polymer composite material pad being located between the two metal pads, the inner hole shape of the metal pads matching the cross-section of the non-circular segment, and the inner hole shape of the first polymer composite material pad being larger than the cross-section of the non-circular segment.

[0008] In a preferred embodiment of the present invention, the first polymer composite gasket is fixedly installed inside a sleeve that is fixedly connected to the fixed bracket.

[0009] In a preferred embodiment of the present invention, the pressure compensation structure includes two springs, which are coaxially disposed between the friction damping structure and the fixed bracket and between the friction damping structure and the rotating bracket, respectively.

[0010] In a preferred embodiment of this utility model, one end of each of the two springs is fixedly connected to both the fixed bracket and the rotating bracket, and the other end is slidably connected to the friction damping structure through a second polymer composite material gasket.

[0011] The beneficial effects of this utility model are: This utility model provides a wear-resistant high-precision rotating shaft structure for electronic devices. The rotating shaft structure is equipped with a wear-resistant structure, which can increase its wear resistance and thus improve its service life, overcoming the problems existing in the precision rotating shafts used in mid-to-high-end equipment. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of a wear-resistant, high-precision rotating shaft structure used in electronic devices.

[0013] The components in the attached diagram are labeled as follows: 1. Fixed bracket; 2. Rotating bracket; 3. Rotating spindle; 4. Non-circular segment; 5. Metal gasket; 6. First polymer composite gasket; 7. Second polymer composite gasket; 8. Sleeve; 9. Spring; 10. Fixing pin. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0015] according to Figure 1A wear-resistant, high-precision rotating shaft structure for electronic devices includes a fixed bracket 1, a rotating bracket 2, and a rotating spindle 3. One end of the rotating spindle 3 passes through and is fixed to the rotating bracket 2 by a fixing pin 10, while the other end is rotatably connected to a shaft hole on the fixed bracket 1. The fixed bracket 1 and the rotating bracket 2 are respectively connected to the base and screen of the electronic device. A wear-resistant structure is installed between the fixed bracket 1 and the rotating bracket 2 to increase its wear resistance and thus improve its service life, overcoming the problems existing in existing precision rotating shafts used in mid-to-high-end equipment.

[0016] The wear-resistant structure includes a friction damping structure subjected to a preload in the axial direction to generate static friction for maintaining the screen portion at any angle, and a pressure compensation structure that automatically compensates for the attenuation of the preload to maintain the long-term stability of the static friction.

[0017] The friction damping structure is disposed on the rotating spindle 3, and the pressure compensation structure is disposed between the friction damping structure and the fixed bracket 1 and between the friction damping structure and the rotating bracket 2.

[0018] The rotating spindle 3 has a non-circular segment 4 at its center. The friction damping structure is disposed on the non-circular segment 4. The friction damping structure includes two metal pads 5 and a first polymer composite material pad 6. The first polymer composite material pad 6 is located between the two metal pads 5. The friction coefficient of the first polymer composite material pad 6 is stable and has self-lubricating properties, which can produce an extremely smooth and non-sticky damping feel, avoiding the stiff or jerky feeling common in metal friction.

[0019] The inner hole shape of the metal gasket 5 matches the cross-section of the non-circular segment 4, ensuring that there is no relative rotation between the metal gasket 5 and the rotating spindle 3, thus achieving absolute torque transmission.

[0020] The inner hole shape of the first polymer composite gasket 6 is larger than the cross-section of the non-circular segment 4. Its inner hole shape is usually a simple circle with a diameter slightly larger than the outer circle diameter of the non-circular section of the rotating mandrel 3, so as to ensure that it does not rotate with the rotating mandrel 3.

[0021] With an interleaved structure, all metal pads 5 rotate synchronously via the rotating spindle 3, while the first polymer composite material pad 6 remains relatively stationary. The main friction occurs at the contact interface between the metal pads 5 and the first polymer composite material pad 6. This design, which disperses a single friction pair to two parallel interfaces, reduces the pressure at each interface, resulting in more uniform wear and faster heat dissipation.

[0022] The first polymer composite gasket 6 is fixedly installed inside the sleeve 8, which is fixedly connected to the fixed bracket 1.

[0023] The pressure compensation structure includes two springs 9, which are coaxially arranged between the friction damping structure and the fixed bracket 1 and between the friction damping structure and the rotating bracket 2, respectively.

[0024] The wear of the friction damping structure is mainly manifested as a uniform and slow decrease in overall thickness. This unidirectional and predictable dimensional change is the premise for the spring 9 to effectively compensate. If the wear is irregular and localized, any compensation mechanism will fail.

[0025] One end of each of the two springs 9 is fixedly connected to both the fixed bracket 1 and the rotating bracket 2, and the other end is slidably connected to the friction damping structure through the second polymer composite material gasket 7.

[0026] The second polymer composite gasket 7 is used to ensure that the preload applied by the spring 9 can be uniformly transmitted to the friction damping structure.

[0027] The materials of the second polymer composite gasket 7 and the second polymer composite gasket 7 include polyether ether ketone materials filled with polytetrafluoroethylene, molybdenum disulfide or aramid fibers and polyimide materials filled with polytetrafluoroethylene, molybdenum disulfide or aramid fibers.

[0028] Compared with the prior art, the present invention provides a wear-resistant high-precision rotating shaft structure for electronic devices. The rotating shaft structure is equipped with a wear-resistant structure, which can increase its wear resistance and thus improve its service life, overcoming the problems existing in the precision rotating shafts used in mid-to-high-end equipment.

[0029] In the description of this utility model, it should be noted that all components are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional test methods. The terms "upper", "lower", "left", "right", "inner" and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wear-resistant, high-precision rotating shaft structure for electronic devices, comprising a fixed bracket, a rotating bracket, and a rotating spindle, wherein one end of the rotating spindle passes through and is fixed to the rotating bracket by a fixing pin, and the other end is rotatably connected to a shaft hole opened on the fixed bracket; the fixed bracket and the rotating bracket are respectively connected to the base portion and the screen portion of the electronic device, characterized in that: A wear-resistant structure is installed between the fixed bracket and the rotating bracket; The wear-resistant structure includes a friction damping structure subjected to a preload in the axial direction to generate static friction force for maintaining the screen portion suspended at any angle, and a pressure compensation structure that automatically compensates for the attenuation of the preload to maintain the long-term stability of the static friction force. The friction damping structure is disposed on the rotating spindle, and the pressure compensation structure is disposed between the friction damping structure and the fixed bracket and between the friction damping structure and the rotating bracket.

2. The wear-resistant, high-precision rotating shaft structure for electronic devices according to claim 1, characterized in that, The rotating spindle has a non-circular section at its center, and the friction damping structure is disposed on the non-circular section.

3. The wear-resistant, high-precision rotating shaft structure for electronic devices according to claim 2, characterized in that, The friction damping structure includes two metal pads and a first polymer composite material pad. The first polymer composite material pad is located between the two metal pads. The inner hole shape of the metal pad matches the cross-section of the non-circular segment. The inner hole shape of the first polymer composite material pad is larger than the cross-section of the non-circular segment.

4. The wear-resistant, high-precision rotating shaft structure for electronic devices according to claim 3, characterized in that, The first polymer composite gasket is fixedly installed inside the sleeve that is fixedly connected to the fixed bracket.

5. The wear-resistant, high-precision rotating shaft structure for electronic devices according to claim 3, characterized in that, The pressure compensation structure includes two springs, which are coaxially disposed between the friction damping structure and the fixed bracket and between the friction damping structure and the rotating bracket, respectively.

6. The wear-resistant, high-precision rotating shaft structure for electronic devices according to claim 5, characterized in that, One end of each of the two springs is fixedly connected to both the fixed bracket and the rotating bracket, while the other end is slidably connected to the friction damping structure via a second polymer composite material gasket.

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